KA258ADTF Equivalent & Substitute Parts

Part Overview

The KA258ADTF is a general-purpose operational amplifier integrated circuit manufactured by onsemi, configured as a dual-channel amplifier in an 8-SOIC surface mount package. This device is classified as obsolete, indicating it is no longer in active production. The identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for applications currently utilizing the KA258ADTF. Substitute parts must maintain functional compatibility through matching electrical specifications and identical physical packaging.

Key Parameters

Parameter	KA258ADTF Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Current - Input Bias	40	nA
Voltage - Input Offset	1	mV
Current - Supply	800	µA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	32	V
Operating Temperature	-25 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the KA258ADTF is determined by the following critical parameters: dual-channel general-purpose amplifier configuration, 8-SOIC surface mount package, supply voltage range of 3V to 32V, and operating temperature range of -25°C to 85°C. Parts are grouped into two categories based on substitution compatibility:

Direct Substitutes (Active Status): Parts that maintain all critical electrical and thermal specifications of the KA258ADTF while offering active product status and improved availability. These parts are pin-compatible and functionally equivalent within the specified operating envelope.

Similar Substitutes (Extended Specifications): Parts that share the core dual-channel general-purpose amplifier architecture and 8-SOIC package but may feature extended operating temperature ranges, enhanced electrical performance, or different supply current characteristics. These parts are compatible when application requirements permit operation within their specified parameters.

Parameter Comparison

Part Number	Manufacturer	Product Status	Input Bias Current (nA)	Input Offset Voltage (mV)	Supply Current (µA)	Output Current / Channel (mA)	Supply Voltage Min (V)	Supply Voltage Max (V)	Operating Temperature (°C)	Package
KA258ADTF	onsemi	Obsolete	40	1	800	30	3	32	-25 to 85	8-SOIC
LM258DR2G	onsemi	Active	45	2	800	40	3	32	-25 to 85	8-SOIC
LM2904DR2G	onsemi	Active	45	2	800	40	3	26	-40 to 85	8-SOIC
LM2904VDR2G	onsemi	Active	45	7	1500	40	3	32	-40 to 125	8-SOIC
LM358ADR2G	onsemi	Active	45	2	800	40	3	32	0 to 70	8-SOIC
LM358DR2G	onsemi	Active	45	2	800	40	3	32	0 to 70	8-SOIC
MC34072ADR2G	onsemi	Active	100	0.5	1900	30	3	44	0 to 70	8-SOIC
MC34072DR2G	onsemi	Active	100	1	1900	30	3	44	0 to 70	8-SOIC
MC34072VDR2G	onsemi	Active	100	1	1900	30	3	44	-40 to 125	8-SOIC
NCV2904DR2G	onsemi	Active	45	7	1500	40	3	32	-40 to 125	8-SOIC
LM258ADR	Texas Instruments	Active	15	2	500	40	3	32	-25 to 85	8-SOIC

Engineering Selection Recommendations

Primary Substitute: LM258DR2G (onsemi) is the recommended direct substitute for the KA258ADTF. This part maintains identical supply voltage range (3V to 32V), matching operating temperature range (-25°C to 85°C), and equivalent electrical performance within the specified parameters. The LM258DR2G is in active production status with substantial inventory availability (505,200 units), ensuring long-term supply continuity. Both parts are ROHS3 compliant and carry identical moisture sensitivity classification (MSL 1).

Secondary Substitute: LM258ADR (Texas Instruments) provides functional equivalence with the same operating temperature range (-25°C to 85°C) and supply voltage specifications (3V to 32V). This part offers superior input bias current performance (15 nA versus 40 nA) and lower supply current consumption (500 µA versus 800 µA), making it suitable for applications where power efficiency is a design consideration. Active production status and ROHS3 compliance confirm regulatory alignment.

Extended Temperature Range Alternatives: LM2904VDR2G and NCV2904DR2G both extend the operating temperature range to -40°C to 125°C while maintaining the 3V to 32V supply voltage envelope. These parts are appropriate for applications requiring operation beyond the standard -25°C to 85°C range. Both are in active production with ROHS3 compliance.

Higher Performance Option: MC34072DR2G and MC34072VDR2G provide enhanced electrical characteristics including lower input offset voltage (1 mV) and extended supply voltage capability (up to 44V). The MC34072VDR2G variant supports the widest operating temperature range (-40°C to 125°C). These parts are suitable when improved precision or higher supply voltage operation is required.

All recommended substitutes maintain the 8-SOIC surface mount package, dual-channel configuration, and general-purpose amplifier classification of the KA258ADTF.

Frequently Asked Questions (FAQ)

Q: Can LM258DR2G be used as a direct replacement for KA258ADTF without circuit modification?

A: Yes. The LM258DR2G is pin-compatible with the KA258ADTF in the 8-SOIC package. Both parts operate across the identical supply voltage range (3V to 32V) and temperature range (-25°C to 85°C). Electrical specifications are within compatible tolerances for general-purpose amplifier applications.

Q: What is the primary difference between LM258DR2G and LM2904DR2G?

A: The LM2904DR2G has a reduced maximum supply voltage specification (26V versus 32V) and an extended minimum operating temperature (-40°C versus -25°C). For applications requiring the full 32V supply range, LM258DR2G is the appropriate choice.

Q: Why do some substitute parts have higher supply current specifications?

A: Parts such as LM2904VDR2G and NCV2904DR2G specify 1.5 mA supply current (per channel) compared to the KA258ADTF's 800 µA. These parts are designed for extended temperature operation (-40°C to 125°C) and may have different internal biasing architectures. Selection depends on whether the application's power budget accommodates the higher current draw.

Q: Is the MC34072 series suitable for direct substitution?

A: The MC34072 series shares the 8-SOIC package and dual-channel configuration but features enhanced performance characteristics including higher slew rate (13 V/µs) and greater gain-bandwidth product (4.5 MHz). These parts are compatible when the application can utilize the improved performance specifications. Operating temperature ranges vary by variant (0°C to 70°C or -40°C to 125°C).

Q: What is the significance of the "V" designation in part numbers like LM2904VDR2G?

A: The "V" suffix indicates extended operating temperature range capability (-40°C to 125°C) compared to standard variants. This designation is relevant only when the application requires operation outside the standard -25°C to 85°C or 0°C to 70°C ranges.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity classification, matching the regulatory and handling requirements of the KA258ADTF.

Q: Which substitute offers the best input bias current performance?

A: The LM258ADR (Texas Instruments) provides the lowest input bias current at 15 nA, compared to 40 nA for the KA258ADTF and 45 nA for most onsemi alternatives. This characteristic is beneficial for high-impedance input applications.

Q: Can the KA258ADTF be replaced with a part having a different maximum supply voltage?

A: Substitution with parts having different maximum supply voltage ratings is permissible only when the application's actual supply voltage remains within the overlapping range. For example, LM2904DR2G (26V max) can replace KA258ADTF (32V max) in circuits operating at 26V or below. Verify the circuit's actual supply voltage before selecting a substitute with reduced maximum rating.

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